--- linux/drivers/net/ppp_generic.c.virgin	Mon Jan 22 02:37:42 2001
+++ linux/drivers/net/ppp_generic.c	Tue Jan 23 04:36:48 2001
@@ -1569,11 +1569,12 @@
 	struct sk_buff_head *list = &ppp->mrq;
 	u32 seq = skb->sequence;
 
-	/* N.B. we don't need to lock the list lock because we have the
-	   ppp unit receive-side lock. */
+	ppp_lock(ppp);
 	for (p = list->next; p != (struct sk_buff *)list; p = p->next)
 		if (seq_before(seq, p->sequence))
 			break;
+	ppp_unlock(ppp);
+
 	__skb_insert(skb, p->prev, p, list);
 }